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United Nations Environment Programme[Desertification Control Bulletin Number 22, 1993: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation]Desertification Control Bulletin Number 22, 1993: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

United Nations Environment Programme[Desertification Control Bulletin Number 23, 1993: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation]Desertification Control Bulletin Number 23, 1993: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

United Nations Environment Programme[Desertification Control Bulletin Number 15, 1987: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation]Desertification Control Bulletin Number 15, 1987: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

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